Bug 1628692 - Prepare dom/media for making FallibleTArray uncopyable. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D72623

dom/media/mediasource/TrackBuffersManager.cpp

@@ -2882,7 +2882,7 @@ void TrackBuffersManager::GetDebugInfo(
       range->mStart = ranges.Start(i).ToSeconds();
       range->mEnd = ranges.End(i).ToSeconds();
     }
-    aInfo.mRanges = items;
+    aInfo.mRanges = std::move(items);
   } else if (HasVideo()) {
     aInfo.mNextSampleTime = mVideoTracks.mNextSampleTime.ToSeconds();
     aInfo.mNumSamples = mVideoTracks.mBuffers[0].Length();
@@ -2901,7 +2901,7 @@ void TrackBuffersManager::GetDebugInfo(
       range->mStart = ranges.Start(i).ToSeconds();
       range->mEnd = ranges.End(i).ToSeconds();
     }
-    aInfo.mRanges = items;
+    aInfo.mRanges = std::move(items);
   }
 }
 

dom/media/mp4/MoofParser.cpp

@@ -93,8 +93,8 @@ bool MoofParser::RebuildFragmentedIndex(BoxContext& aContext) {
         mMoofs.LastElement().FixRounding(moof);
       }
 
-      mMoofs.AppendElement(moof);
       mMediaRanges.AppendElement(moof.mRange);
+      mMoofs.AppendElement(std::move(moof));
       foundValidMoof = true;
     } else if (box.IsType("mdat") && !Moofs().IsEmpty()) {
       // Check if we have all our data from last moof.